Pressure-responsive valve



Dec. 22, 1942. J. KUTTNER PRESSURE RESPONSIVE VALVE Filed July 29. 19404| X w om .m Lw A v M da w 1.. ...nu l. n H H Il ....HHHHHHH ||1| H/ O/l/ M) G Uhu .nu H u .Hun .H mnu .HNIHHIMM A f/ c j, Q T6 INVENI' OR.

Patented Dec. 22, 1942 PRESSURE-RESPONSIVE VALVE Julius Kuttner, Beloit,Wis., "assigner to Fairbanks, Morse& Go., Chicago, Ill., a corporationof Illinois Application July 29, 1940, Serial No. 348,470

7 Claims.

This invention relates to improvements in valves for fluid pumps orcompressors of a character suitable for use on internal combustionengines to supply the engine cylinders with scavenging and charging air,the invention having particular reference to an improvedpressure-responsive valve capable of ready embodiment in a pump of thetype indicated.

The principal object of the invention is to provide apressure-responsive check-valve for fluid pumps and the like, which isgreatly improved in form and construction, suchvthat in eiiectivenessand eciency, the resulting valve is markedly superior to prevailing orother similar valves provided for a like purpose.

Another object is attained by the provision of an improved, quick-actingpressure-responsive valve of a simple and economical construction, whichis adapted for ready incorporation in a uid pump of the type indicated,and which when so employed, eiects a material increase in the iluidpumping eiciency of the pump.

A further object is to provide a compact, quickacting and highly eicientcheck valve device which is readily adaptable for embodiment in fluidpumps or similar apparatus, or in fluid handling systems, wherein one ormore fluid control valves having the foregoing characteristics, arerequired.

A further object resides in the provision of an improved check valve ofthe character indicated, in which the port-forming elements thereof areso formed and arranged as to provide substantially streamlined ports andport-delivery passages, thereby markedly improving the fluid-flowlcharacteristics of the Valve, particularly in respect to a substantialminimization or practical elimination of turbulence or eddying in thefluid streams discharged through the valve ports.

Other objects and advantages of the invention will appear readily fromthe following description of a preferred embodiment thereof, asillustrated by the accompanying drawing, in which:

Fig. 1 is a view in plan, of a pump valve constructed according to thepresent invention, the valve being shown partly in assembly and partlybroken away to illustrate features thereof; Fig. 2 is a longitudinalsectional elevation of the valve, as taken along line 2 2 in Fig. 1;Fig. 3 is a transverse sectional elevation through the valve, as viewedfrom the line 3-3 in Fig. 1, and Fig. 4 is a greatly enlarged,fragmentary sectional elevation taken longitudinally through the valvestructure, illustrating features of the valve portforming elements.

Referring now to the drawing by suitable characters of reference, theimproved valve as illustrated by Fig. 1, includes a rectangular,substantially plate-like valve frame 95 presenting side elements 97, endelements 93 and a central longitudinal rib |00 between the end elements98. The rib |00 is of thickened section, extending below the-uppersurface or face 0| of the frame plate, and is provided with a pluralityof longitudinally spaced, transversely directed rectangular recesses ornotches |02 in the rib face |04. Each of the frame side elements 91 isprovided with a plurality of recesses |05 formed in the innerlongitudinal face margin 06 of the element, as best appears in Fig. 1.The recesses |05 in each ofthe side elements 91, correspond in numberand longitudinal spacing, to the recesses |02 in the rib |00, so thateach recess |05 is in alignment, transversely of the frame plate, withone of the rib recesses |02. A pluralitycf flat, reed-like valveelements |08 of equal length such as to span the opposite frame sides91, are arranged so that each has its central portionseating in one ofthe rib recesses |02, and its ends H0 seating in the frame siderecesses. |05 which are in transverse alignment with the particular ribrecess. The recesses |02 and |05 thus serve to confine the valveelements against displacement longitudinally and transversely of theframe plate, and further serve as guides for the valve elements in theirvalve-port controlling movement laterally of the frame plate, as willhereinafter appear.

Overlying the upper side or face |0| of the frame plate 96, is a valvedeck plate ||2 which in length and width, is substantially co-eXtensivewith the frame plate. The deck plate is suitably secured in assemblywith the frame plate,.in a manner permitting a ready disassembly of theplates for the .purpose of repair or replacement of the valve elements|08 and other parts of the valve-structure, such securement beingeffected according to the present example, by a plurality of bolts |3serving to clamp together the peripheral margins of the two plates. Thebolts ||3 v may -be employed also for securing the valve assembly to`its supporting means in the pump casing, as indicated in Figs.'2 and 3.The deck plate I |2 may be formed from suitable sheet metal stock of apredetermined gauge to assure adequate stillness of the plate, vandtreated as by appropriate punching and shaping operations/to provide aplurality of valve openings or portsV I4 equal in number and spacing, tothe valve elements |08, andopposed, vupstanding elements or ment isthereby effectively retained in assembly,

in the guide recesses |02 and |05.

The port-closing position of each valve is that shown by Figs. 2. and 4,whereinthe valve |08 abuts the port-dening margins||8|2| of the deckplate H2, thereby closing the port H4. By preference, each of the valves|08 is suitably biased toward port-closing position, as' by acompressionspring |22 seated in a spring-socket or bore |24 provided in the framerib |00 at the base or bottom |25 of the rib recess |02, the springengaging for this purpose, the underside ofthe valve, asindicated byFig. 2. Theysprings serve to effect a quick-closing action of theseveral valve elements, in the pressure-differential operation thereofto control the ports H4, as this will be readily appreciated. Moreover,in the presently improved valve construction, each of the valve elementsis relatively light in weight, so that it may respond quickly to thedilerential pressures on the opposite surfaces thereof. With respect tothe valve-receiving recesses |02 and |05, these are of equal,predetermined depth such that when the valve |08 is in full-openposition,

i. e., resting upon the bottoms |25 and ,|26 of the recesses |02 and |05respectively, the resulting open-area between the valve. and the port H4is substantially equal to or greater than the port area, therebyprecluding,anyrestriction in the desired full-volume flow of air orother fluid through the port H4.

While the valve structure as thus far described, may be utilized withimproved results, in pumps of the character indicated, the presentinvention contemplates further and material improvements in the valvestructure, to the end of effecting among other objectives,fa positivevdirectioning and concentration4 of the air flow toward each port, and auniformly smooth air flow through the port throat, as formed in partbythe upstanding elements Hland ||1 heretofore noted, and through theport |4. Accordingly, the deck plate margins ||8|2| which dei-lne eachport H4, are rounded substantially to the-extent indicated in Fig. 4,while the ilanges Hpand H1 which are upstanding from the deck Vplatemargins H8 and H0 and extend over substantially the length thereof(Fig. 1) have their inner surfaces |28 joining smoothly with the roundedsurfaces |29 of the port margins H8 and H9. Thus the port-definingelements for each of the ports ||4 are devoid of sharp edges orprojections which if otherwise present, would tend to create turbulenceor eddying in the air stream passing through and beyond the port. Theopposed, up-

standing elements or flanges H6 and H1 in the zone of each port, are bypreference, inclined outwardly from each other, as to the extentindicated in Fig. 4, and as shown by Figs. 2 and 4 in particular, theelement H1 of one port and the element H6 of the next adjacent port,cooperate in the support of a substantially semi-cylindrical, air-owdirecting and port-throat forming lmember |30. The length of the membery.|30, corresponds substantially to the lengthiof the port Velements r91.

|34 of the opposed end |33, seats upon the corresponding upper edge |40of the next adjacent element H6, with the flange |36 thereof, incontactwith the rear surface |4| of the element. Themember |30 is formedby preference, from suitable sheet metal characterized by a degree ofresiliency suicient to provide for self-retention of the member inassembly with the elements -H6 and H1, as this may be attained bytensioning the member through inward displacement of the ends |32 and|33, to engage and seat vthe same on the deck plate elements I5 and H1.

Themember |30 as so mounted,isreadily detachable in an obvious manner,as will be now appreciated. Further and as best appears in Fig. 4, theassembly arrangement of each member |30 relative to the supporting`elements therefor, is such that the surface section |42 at eachlongitudinal end vof the member, provides a substantially unbrokencontinuation of the surface |23 of the adjacent one of the elements H6and H1.

From the foregoing description, it will be observed now that each portH4, with the exception of they end port yat each endof the valveassembly, intervenes an adjacent pair of the members |30, while theadjacent members |30 cooperate with the upstanding elements H6 and H1 inthe port zone, to form a port throat ,|44 which converges toward theports In such asso,- ciation, the members |30 serve to concentrate anddirect a stream of air to and into the'throat |44, for passage throughthe port I4 and therebeyond. Moreover,y by reason of the rounded platemargins ||8|2| which define the port H4, andthe surface-contour of thecooperating throat-forming elements H5, H1 and |30, lboth the-port andits* throat are effectively streamlined, so that any resistance to asmoothilowing air stream therethrough, is minimized to a very greatextent.y 1

As shown by Figs. 1, 2 and 3, the valve-frame plate S6 and the centrallongitudinall rib l |00 thereof, maybe considerably strengthened by aplurality of laterally extending rib elements |45 joining the centralribv |00 with the frame side In the present example, the strengtheningribs |45 are arranged so that each underliesV one of the ,valve elements|08, whereby to minimize any interference by the ribs, with the freeflow of vair past the valves and Ithrough the open portions of the frame0B. A

According to the VVpresent invention, the `improved valve device isadapted for inclusion in a pump or compressor suitable for providingscavenging air to ,the cylinders of an internal combustion engine. Thevalves being of greatly improved construction, and of a characterdesigned to increase the effectiveness and efficiency ofvalve-operation, serve when utilized in a iluid pump for the purposeindicated, to increasethe eciency and air-delivery pressure of the pumpto -a marked degree, as this has been demonstrated by exhaustivetests onpumps equipped with thev improved valves; Moreover, it is to be notedthat the valve assembly as herein shown 'normand a. plurality ofsubstantially nat, recy and described, pnesentsy a sturdy and compactstructure having a desirable minimum overall thickness or depth asclearly appears from Figs. 2 and 3.

While the present description and drawing relate to a preferredembodiment of the invention, it is to be understood that the presentlyimproved valve construction may be altered or modified in respect to theparts and assembly arrangement thereof, without departing from thespirit and intended scope of the invention, as dened by the appendedclaims.

I claim:

1. A fluid-pressure responsive control valve of the character described,comprising a frame, a deck plate on said frame, formed to provide aplurality of substantially rectangular ports and laterally directedflange elements along opposite margins of each port, a resilientsemi-cylindrical wall element arranged between each adjacent pair ofports and provided with recessed shoulders along the opposite marginsthereof adapted for frictional engagement with the adjacent flangeelements of said ports, said shoulders in engagement with the flangeelements providing the sole support for said wall element, the flangeand wall elements in the zone of each port, cooperating to form aport-throat converging toward and communicating with the port, andfluid-pressure responsive valve means operatively carried by said framein controlling relation to said ports.

2. A fluid-pressure responsive control valve of the character described,comprising a substantially open rectangular frame having a plurality ofrecesses in the opposite longitudinal margins thereof, a plurality offluid-pressure responsive valve elements spanning said longitudinalframe margins and having their ends received in said recesses, a deckplate overlying said frame and valve elements, formed to provide aplurality of substantially rectangular ports arranged such that eachthereof is controlled by one of said valve elements, flange elementscarried by and directed laterally of the deck plate, along oppositelongitudinal margins of each port, and a curved wall element extendinglongitudinally between each adjacent pair of ports and adapted for solesupport by the adjacent flange elements of said ports, said flange andwall elements in the zone of each port, cooperating to form a portthroatconverging toward and communicating with the port.

3. A check valve of the character described, comprising a substantiallyopen rectangular frame member, a plate-like member in overlyingengagement, with the frame member, said platelike member being formed toprovide a plurality of substantially rectangular ports therein, andupstanding integral flange elements extending along the oppositelongitudinal margins of each port, said ports being arranged in paralleladjacence and the marginal edge portions of the member which define eachport, being appreciably rounded, a curved wall element arranged betweeneach adjacent pair of ports, and formed to provide recessed shouldersalong the longitudinal margins thereof adapted for detachable engagementwith the adjacent flange elements of the adjacent pair of ports, saidshoulders in engagement with the flange elements providing the solesupport for the wall element, said wall and flange elements serving toprovide in the zone of each port, a port-throat converging toward andcommunicating with the associated tangular valvev elements, saidframe'and platelike` members cooperating. in the'op'erative sup'- portofsaid` valve elementfaeacn in controlling relation to one of said ports.

LA Liiuid 'check valvebf the character described, comprisinga frameproviding parallel side and end elements anda rib element extendingparallel to said side elements and between said end elements, saidrib-and side elements each having a guide recess therein, asubstantially at, reed-like valve element movably seated in saidrecesses, a deck plate roverlying said frame and valve element, formedto provide a substantially rectangular port in register with the valveelement for control thereby, flange elements formed integrally'lwithsaid plate and extending along the opposite longitudinal margins of theport, and curved Wall elements each provided with a shouldered seat toreceive one of said flange elements, said'-ange and wall elementscooperating in assembly, to form a portthroat converging toward saidport.

5. A check valve of the character described, comprising a substantiallyopen rectangular frame provided with recesses in opposite marginsthereof, a flat rectangular valve element having its ends received insaid recesses, a platelike member overlying thefframe and Valve element,formed to provide a, port therethrough in register with the valveelement, said plate-like member cooperating with "the frame recesses inconstraining said valve element to movement toward and away fromsaidport, iiange elements integral with said plate member and arrangedalong opposite margins of said port, said flanges being relativelydivergent from the port zone of the plate member, and curved wallelements each provided with mounting means adapted for wall-supportingengagement: with one of the ange elements, said wall elementsconstituting continuations of said ange elements and cooperatingtherewith in forming a port-throat converging toward said port. f

6. A valve of the character described, comprising a substantially openrectangular frame, a sheet metal deck plate on said frame, said deckplate being formed to provide rectangular portopenings therethroughand-,outstruck relatively divergent flange elements along oppositelongitudinal margins of each port, rectangular reedlike valve elements,saidframe and deck plate cooperating'in the operative support of saidvalve elements each in controlling relation to one of the port-openings,and substantially semi-cylindrical sheet metal wall elements arrangedlongitudinally between said port-openings, each of said wall elementsbeing deformed along the opposite margins thereof, to provide mountingelements adapted for frictional wall-supporting engagement with adjacentflange elements of an adjacent pair of said port-openings, said wallelements in assembly constituting continuations of said flange elementsand forming therewith port-throats converging toward the port-openings.

7. A valve of the character described, including a frame, a. deck plateoverlying said frame and formed to provide rectangular ports therein andrelatively divergent flange elements along opposite longitudinal marginsof each port, rectangular valve elements, said frame and deck platecooperating in the operative support of said valve elements each incontrolling relation to one of said ports, and resilient wall elementsof substantially wsemi'-cylindricz'il form, I arranged longitudinallybetween said ports, eaichV ofV said wall elements, being: deformedtalong the4 opposite longitudinal marginsV thereof to provide mount,-ing elements adapted fonfrictional wallfsupportingengagement,Withad-jacent .vange' elements of an adjacentpair of ports,said mounting elements iny frictional engagement with the port angesproviding the sole support for each of the wall elements; and said wallelements in assembly, constituting continuations of said port'ilangesand V forming therewith, port-throats converging toward the ports.JULIUS KUTTNER.

